Influence of microcompositional gradients on stress corrosion crack propagation

✍ Scribed by G.L. Berry Jr.; D.L. Olson; D.K. Matlock

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 446 KB
• Volume: 148
• Category: Article
• ISSN: 0921-5093
• DOI: 10.1016/0921-5093(91)90859-l

✦ Synopsis

Stress corrosion cracking in compositionally non-uniform systems is addressed. Of special interest is the preferred direction of crack propagation in stress-corroded weld metal. Solidified structures of a cast austenitic stainless steel designed to simulate a solidified weld structure were homogenized to various degrees which caused changes in their microcompositional profiles, resulting in subsequent changes in cracking susceptibility and rates. A K~scc expression was modified using Cahn-Hiiliard non-uniform thermodynamic concepts to explain the change in cracking behavior.